Light travels through disordered media on a random path that is hard to control. A comprehensive study has now shown that optical energy can be deposited at a desired depth in a disordered waveguide by injecting a light field with a particular shape.
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Ojambati, O.S. Optical energy on demand. Nat. Phys. 18, 227–228 (2022). https://doi.org/10.1038/s41567-022-01509-y
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DOI: https://doi.org/10.1038/s41567-022-01509-y